Medium2D

Medium2D defines a two-dimensional diagonally anisotropic medium.

This object corresponds to tidy3d.Medium2D (opens new window).

Name

name: Optional unique name for the medium.

Type

type: Medium model used by this material entry.

• Options: Medium2D

Color

color: Display color used for the medium in the GUI.

• Type: color
• Default: automatically assigned by the GUI

General Properties

The ss and tt fields define the two in-plane components of the diagonal permittivity tensor.

Field	In-plane component	Description	Required
ss	first	Medium describing the first in-plane component.	Yes
tt	second	Medium describing the second in-plane component.	Yes

Supported options for both fields:

• Medium
• LossyMetalMedium
• Pole Residue
• Sellmeier
• Lorentz
• Debye
• Drude
• PECMedium

The ss and tt components refer to the two in-plane dimensions. For example, if the 2D material is normal to the y-axis, ss maps to the x component and tt maps to the z component of the corresponding 3D medium.

Advanced

set_from_global_frequency: Toggle whether the frequency range is set from the Global Settings frequency range.

• Options:
  • True: Use the global frequency range and disable manual frequency range inputs.
  • False: Manually set frequency_range.

frequency_range: Optional range of validity for the medium.

• Type: two float numbers
• Unit: Hz, kHz, MHz, GHz, THz, or other available frequency unit
• Default: None

allow_gain: Toggle whether the medium is allowed to be active.

• Options: True/False
• Default: False

NOTE

Only diagonal anisotropy is supported for Medium2D.